The strongest evidence Roger Clemens used steroids will be turned over to Congress tomorrow, lawyers for the pitcher’s former trainer said.

Brian McNamee is scheduled to meet with staff members of the House Committee on Oversight and Government Reform tomorrow morning. At that meeting he will turn over physical evidence he feels is proof Clemens used steroids.

“Tomorrow we will turn over evidence to Congress which will corroborate Brian McNamee’s truth-telling and make it clear he administered steroids to Roger Clemens,” McNamee’s lawyer, Richard Emery, said.

Neither Emery nor Ward would disclose what that evidence is. They said McNamee turned this evidence over to federal prosecutors last year.

A source familiar with the case said McNamee had syringes used to inject Clemens with steroids and human growth hormone. The syringes still have trace amounts steroids, growth hormone and Clemens’ blood. He also turned over gauze pads that may contain Clemens’ blood.

Up until now it has been McNamee’s word against Clemens’. If this evidence is indeed what it is cracked up to be, McNamee’s claims become stronger.

“This will take it out of the he-said, she said of disputes, in our view,” Emery said.

Earl Ward, another lawyer for McNamee, said McNamee will discuss the evidence with Congress then the lawyers will hold a press conference in Washington.

McNamee identified Clemens as a steroid user to federal prosecutors last year, then to former Sen. George Mitchell, who investigated steroid use in baseball. Clemens was included in Mitchell’s report, which was released in December. Since then, Clemens has been on an aggressive campaign to refute the allegations.

Clemens gave a deposition under oath to committee staffers yesterday. Afterward, he told reporters that he denied ever using steroids or HGH.

If Congress believes Clemens is lying, they could ask the Department of Justice to pursue criminal charges against the seven-time Cy Young winner.